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Description

Lead telluride is a compound of lead and tellurium that occurs naturally in the mineral altaite. It is a narrow gap semiconductor that has low thermal conductivity, and hence it can be used as a thermoelectric material. It is often alloyed with tin to make lead tin telluride.

Applications

Lead telluride finds applications in the following:

Infrared detection and imaging

Solar cells.

Chemical Properties

The chemical properties of lead telluride are provided in the table below:

Chemical Properties

Chemical Formula

PbTe

Molecular Weight

334.8

CAS No.

1314-91-6

Group

Lead – 14
Tellurium - 16

Crystal Structure

Cubic

Lattice Constant

6.454 Å

Electrical Properties

The electrical properties of lead telluride are provided in the table below:

Electrical Properties

Band Gap

0.25 eV

Electron Mobility

1600 cm2/Vs

Hole Mobility

600 cm2/Vs

Thermal and Mechanical Properties

The thermal and mechanical properties of lead telluride are provided in the tables below:

Thermal Properties

Heat of Formation

393 kJ/mol

Thermal Conductivity

2.30 W/mK

Mechanical Properties

Density

8.16 g/cm3

Melting Point

907°C

Mohs Hardness

3

Safety Information

Safety Information

GHS Hazard Statements

H302 - Harmful if swallowed
H332 - Harmful if inhaled
H360Df - May damage the unborn child. Suspected of damaging fertility
H373 - May cause damage to organs through prolonged or repeated exposure
H410 - Very toxic to aquatic life with long lasting effects.

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